John c



1.,C. DUANE.

TYPE WRITING MACHINE.

APPLICATION FILED FEB. z. 1911.

1,322,548. 7 Patented Nov. 25, 1919.

2 SHEETSSHEET I.

INVENTOR WITNESSES:

ATTORNEY.

J. C. DUANE.

TYPE WRlTlNG MACHINE,

APPLICATION FILED FEB 1. 19m

Patented Nov. 919.

2 SWEEPS-355K: INVENTOR= W ATTORfiEY.

JOHN C. DOANE, OF HARTFORD, CONNECTICUT, ASSIGNOR TO UNDERWOOD TYPEWRITER COMPANY, OF NEW YORK, N. Y., A CORPORATION OF DELAWARE.

TYPE-WRITING MACHINE.

Specification of 1..etters Patent.

Application filed February 7, 1917. Seria1 No. 147,044.

To all whom it may concern Be it known that I, JOHN C. DoANn,'a citizen of the United States, residing in Hartford, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Type- Writing Machines, of which the following is a specification.

My invention relates to typewriting machines and more especially to escapement mechanism for such machines. It is especially adapted to enable languages, other than English, to be written easily and rapidly on such machines.

It is-a great desideratum in building typewriting machines for said languages and other special kinds of work, to have the mechanism of such a formthat it may be easily built, as" far aspossible from the standard parts of ordinary machines, and that it may be built by the standard machinery used in the manufacture of stand ard machines. At the same time the mechanism for effecting the new functions must be strong and not likely to get out of order.

My invention is herein disclosed as applied to an Underwood typewriting ma chine, in which the ordinary feeding and holding escapement dogs usual in such machines, may be either ineffective, or else effective to feed the typewriter carriage either one or two letter-spaces, depending on what typewriter key is depressed.

I have found it possible to attain these objects by utilizing most of the parts of the usual Underwood escapement mechanism, including the usual universal bar which feeds the carriage and actuates the ribbon vibrator.

I am able to preserve the simplicity and efiitracy of the usual escapement mechanism by causing the ordinary loose dog ofthe Underwood typewriter tothave a variable throw, said throw being controlled by the key which is depressed at the moment. Thus the ordinary typewriter key may operate the usual escapement in the usual man ner while a special dou'ble width character key may cause the loose dog to have an extra throw; while a silent key, such as an accentkey, may shift to ineffective position an interponent which normally is in effective position, between the universal bar and the feeding and holding dog mechanism.

Thus a single umversal bar is able to fulfil all the functions hitherto thrown on it together with the added function of feeding the carriage. an extra space for an extra wide character.

Other features and advantages will here inafter appear.

In the accompanying drawings,

Figure 1 is a sectional side view of an Underwood ty'pewriting machine, showing my invention as applied thereto.

F ig. 2 is a sectional plan view of the escapement mechanism, at apoint near the bottom of the ordinary escapement wheel.

Fig. 3 is a skeleton perspective view of many of the principal parts shown in Fig. 1.

Fig. 4 is afront view of the escapement mechanism in the position in which it normally holdsthe typewriter carriage.

Fig. 5 is a similar view, showing the position of the parts when a key is depressed to cause a single step movement of the carriage.

Fig. 6 is a similar view, but showing the parts positioned when a key is depressed which gives the carriage a two-step movement.

Patented Nov. 25, 1919.

In the Underwood typewriting machine,

type-bar 3 is connected to its key-lever 2 by means of the usual bell-crank 7, which engages with a pin 8 on the key-lever, and swings up the type-bar by means of a pin 9 running in a cam slot 10 on the type-bar.

The typewriter carriage 6 is normally under tension drawing it to the left by means of the usual spring barrel 11, which is connected to the carriage by a 'band 12, but the carriage is normally held against the tension of the s ring-11 by an escapement wheel 13. T is is prevented from turning 'by a feeding dog 14, and is connected by the usual spring pawls 17 to a pinion 15 which meshes with a rack 16 connected to the typewriter carriage. This permits the carriage to be drawn back while the escapement wheel 13 remains engaged with the dog 14.

' Every time a key 1 is depressed to print, it releases the carriage from the loose or feeding dog 14 by rocking a fixed or holding dog 18, on whichthe feeding dog is pivoted, so that the feeding dog 14 is pushed rearwardly clear of the escapement wheel 13, while the face 19 of the fixed dog engages the same tooth of the escapement wheel 13 and holds the wheel so the carriage makes practically no movement if the esca-pement is properly adjusted. The freeing of the fixed dog 14 from the escapement wheel 13 permits the usual spring 20 to draw said dog to the left until it is arrested by a shiftable stop 21. Normally this shiftabl'e stop 21 stands in the position seen in Fig. 2, in which an extension 22 of the shiftable stop 21 arrests the feeding dog 14 in the position shown in Fig. 5. This shift ing of the dogs is accomplishedby .the usual universal bar or frame 23, which is pivoted on idle rockers 24 at the rear of the machine, and which, at the front, includes a segment extension 25, which is struck by a heel 26 on the rising type-bar, with the result that the universal bar 23 moves backward against the tension of a spring 27 which normally draws it forward. In thus moving backward, a cross-bar 28, forming partof the universal frame 23, strikes a pin or lug 29 on the holding dog 18 by means of an interponent which Wlll resently be described, and thus rocks said dog backward in the manner described, it being for this purpose pivoted on the usual bearings 30.

When the key 1 is released, it rises and allows the spring 27 to draw forward the universal bar, and this causes the holding dog .18 to be rocked forwardly, partly because of the spring 20 which is anchored considerably forward of'the pivots forming the step motion.

bearings 30 on! a forward'lyextending bracket 31. The tension of the spring barrel 11 can'then'draw the typewriter carriage along to the left, because the escapement Wheel 13 is nolongr held by the holding dog 18, but is freeto be moved to its righthand position against the tension of its spring 20. The limit of its throw to the right is determined by an arm or lug 32 extending rearwardly from the holding dog.

- If, however, a special character key 33 is caused to print a character which requires the typewriter carriageto feed more than a single step, said key operates connections whereby the lug 22' is moved to ineffective position, thus permitting the feeding ,dog 14 to be drawn farther-to the left on" the depression of the key, with the result that on the rise of the key the typewriter carriage will be able to movethe feeding dog farther, Fig; 6, and therefore have a longer To effect this, each key 33 is connected to shift the lug 22, doing this by means of a'link 34 detachably hooked into aslot 35 in its key-lever. To enable the lug 22 to be shifted, it is -formed as part of a slidable plunger 36, which is normally pressed forwardly by a spring-37,' coiledtime the shaft 39 is rocked to carry its rock arm 38 rearwardly, the plunger 36 is moved rearwardly to carry, the lug 22 to a position clear of the feeding dog 14, and to bring a cut-away step portion 40 of the plunger opposite said feeding dog. In order to rock t 1e shaft 39, each link 34 is hooked by means of a slot 41 to a headedpin 41 on the end of a rock arm 42, which is fast to said shaft 39. Thus, the connections are such that the depression of the key 33 will draw down the link 34 to draw down the rock arm 42,

thus rocking the shaft 39, swinging the rock cannot escape from theslots. To permitready assembly of the mechanism, the slots 41*" are provided with enlarged extensions 44 which can be hooked over the headed pins 41,'thus permitting the narrow portions of said slots 40 to be securely caughtby the heads of the pins 41. The spring 43, by holding the rock arm 42 upward, also serves to keep the ends 'of'the hooks caught in the slots 35 of the key levers; this being so because the key-levers cannot rise above their normal positions, their throw being limited by the usual stop-bar 46 which is efl'ective on the type-bars.

It will be remembered that in the usual Underwood machine, the universal bar 23 is not moved until 'well on toward the end of the key depression, and the connections between the two-step feeding keys 33 and the plunger 36 are advantageously such that the lug 22 remains effective to cause the normal feeding movement of the carriage until about the time the escapement mechanism begins torelease the feeding dog 14, thus allowing a key which has been. erroneously partly depressed to be. restored without.

.itto slip behind the adjacent tooth of the escapement wheel 13, as is necessary in preparing for a two-step feeding motion. it will be noted that. there is only one shaft 39 and one arm universa to a the twocross-bar fast thereto step feeding keys 33, and that each of said keys 33 has its own link 34 and its own rock arm 42.

It will be noted that my invention makes it possible to retain the advantages of the usual cam face 19 of the holding dog 18 of the Underwood machine, which makes the escapement thereof'sov accurate and rapid.

For convenience in assembling, the spring 43 engages the shaft 39 by a collar including a set screw 49, and the rock arms 42 are held in place by similar set screws 50. There is also provided a set screw 51 for holding the rock arm 38 in place. The spring 37 pushes the plunger 36 forwardly by bearing against a collar 52 thereon, which is also settable by a set screw 53. The collar is provided with a flat face which bears against a bracket 54 in which the plunger slides, thus holding the plunger 36 from rotation and insuring that the lug 22 will present its proper face to the feeding dog '14.

The depression of a silent character key 55 may cause its type bar to actuate the universal bar or segment in the usual manner, but said silent key before it prints, moves to ineffective position an interponent 56, which normally stands between the universal frame 23 and the dog-operating pin 29 to thereby operate thedog rocker 18. To effect this, key lever 57 of the silent key is provided with an opening 58 which is engaged by the hooked end of a link 59,

said link being adapted to shift the interponent 56 down to a position below the To effect this, the link 59 is hooked an elongated slot over a headed pin 60, forming part of a rock arm 61 on a universal 62, said shaft also having i rock arm 63 which engages of the interponent 56. The henever any key 55 is de- 59 rocks the universal shaft awing down the interponent the cross-bar 23 so that the will rock idly so far as the -8 is concerned.

e of the key, the interponent 56 the lows; result is pressed, 62, ther holding a @n the rises to enective position, being lifted up- 3 ivardly b a weight 65 on a forward extension of the rock arm 63. A. spring 67 also constantly tends to lift the interponent to ei'lective position. The arm (53 operates the interponent 56 by means of a lug 68 formed on the interponent which underlies a turnedover extension 69 on the arm 63.

The universal bar 23 is provided with the usual actuator frame 70 including a slot 71, on which rides a pin 72 or" the usual actuator lever 73 which is efi'ective to lift the ribbon carrier 74 in the usual manner at every key stroke.

It will be observed, that the rock shafts 39 and 62 may be journaled in the same bracket 75, and that the links 59 and 34 may be identical in form except ror their length, and hook on their respective key-levers and headed'pin's in an identical manner, thus rendering the assembling of the machine cheap and the making of its parts equally cheap.

Variations may be resorted to within the scope of the invention, and portions of the improvements may be used without others.

Having'thus described my invention, I claim:

1. In a typewriting machine, the combination with a traveling carriage and character printing keys, of a single universal bar operated by said keys and having a uniform throw, an escapement mechanism for said carriage, an interponent operated by said universal bar for operating said escapement mechanism, an escapement wheel forming part of said escapement mechanism, a dog rocker including a fixed or holding dog and a loose dog also forming part of said escapement mechanism, said loose dog normally holding said carriage by said wheel, means, whereby the universal bar causes the holding dog to hold said carriage and release the loose dog, a spring for drawing said loose dog to position to enable the carriage to be fed along, a bar universal to cerlast-named universal bar, when operated,

moves said interponent to inefiective position, and a single stop selectively moved by others of said keys for selectively determinwhether said loose dog shall be drawn back to position to effect feeding of the carone or more letter spaces.

2. In a typewriting machi e, the combination vith a traveling carri a and character printing keys, of a single I versal bar universal to said keys, an nisni, an interponent op vei ..i bar for operatingmechanism, eye I inting characters of extra width, a :rember universail to said extra width character keys timed to act before said bar, loose dog forming part of said escapenient m chanism normally holding the carriage 53 adapted to be drawn back on the de iiion m3. key, a stop for variably arres dog and normally occupying one i osition, a uni versal shaft operated by cei n other keys, connection whereby the universal shaft, when operat d, makes said interponcnt ineii ec'tive, and means operated by said universal member for shifting said stop to increase the throw of said loose dog.

3. in a typewriting machine, the combination with character printing keys, of a traveling carriage, an escapement for said carriage, a single universal bar for said keys, a ribbon vibrator operated by said universal bar, and means selectively operated by said keys for making said universal escapemcnt bar ineffective or effective to' feed said carriage, one space, or effective to feed said carriage a plurality of spaces.

4. In a typewriting machine, the combination with character printing keys, of a traveling carriage, an escapement for said carriage, a single universal bar for said keys, a ribbon vibrator operated by said universal bar, means selectively operated by said keys for making said universal bar inefl'ective or effective to feed said carriage one space, or effective to feed said carriage a plurality of spaces, said means including a member universal to certain of said keys for rendering said universal bar ineffective, and also including an escapement mechanism to feed said carriage, and a second member universal to only certain of the remaining keys to cause said escapement mechanism to feed said carriage the greater distance.

5. In a typewriting machine, the combination with a traveling carriage and character printing keys, of an escapement mechanism for said carriage, a universal bar having an identical 'throw for all of said keys, and means selectively operated by groups of said keys for making said universal bar effective to feed said carriage or to feed said carriage an extra space or to be ineffective on said carriage,

6. In a typewriting machine, the combination with a traveling carriage and character printing keys, of an escapement mechanism for said carriage operated by' said keys, a universal bar universal to all the keys for said escapement mechanism, an interponent whereby the universal bar actuates the escapement mechanism, a fixed and a loose dog for said escapement mechanism, a fixed stop against which said loose dog normally rests to hold the carriage, a stop limiting the throw of said loose dog when loose, means whereby one group of said keys makes said interponent ineffective, and means whereby another group of said keys shifts said last-named stop to vary the idle throw of said loose dog.

7. In a typewriting machine, the combination with a traveling carriage and character printing keys, of an escapement mechanism for said carriage operated by said keys, a universal bar universal to all the keys for said escapement mechanism, an interponent whereby the universal bar actuates the escapement mechanism, a fixed and a loose dog for said escapement mechanism, a fixed stop against which said loose dog normally rests to hold the carriage, a stop limiting the throw of said loose dog when loose, means whereby one greup of said keys makes said interponent inefiective, and means whereby another group of said keys shifts said lastname-d stop near the end'of a key stroke to vary the idle throw of said loose dog.

8. In a typewriting machine, the combination with a traveling carriage and character 'printing keys, of a universal bar 0perated by said keys, a member universal to certain only of said keys, an escapement mechanism for said carnage, an interponent for said escapement mechanism shiftable by said last named keys, a member universal to said last-named keys for s0 shifting said interponent, a stop for varying the throw of the escapement mechanism, and a member universal to certain only of the remaining keys for varying said escapementthrow.

9. In a typewriting machine, the combination with character printing keys and type-bars operated thereby, ofa universal baroperated by said type-bars as they approach the platen, a rock shaft universal to certain of said keys and operated thereby, a rock shaft universal to certain other of said keys, certain of said keys being ineffective on either rock shaft, a stop variably settable by one rock shaft for varying the escapement, and an interponent shiftable by the other rock shaft making the escapement ineffective.

10. In a typewriting machine, the combi effective on either rock shaft, a stop variably settable by one rock shaft for varying the escapement, an interponent shiftable by the other rock shaft making the escapement inefiective, and a single bracket on which said rock shafts are journaled.

11. In a typewriting machine, the combination with a traveling carriage and character-printing keys, of an escapement. for said carriage, a universal bar operated by said keys near the end of their effective stroke, a loose dog forming part of said escapement and normally holding the carriage, a member shiftable to vary the throw of said dog when it releases the carriage, levers for said keys, a universal rod adjacent said key-levers, links for connecting said universal rod to certain of said keys, and a connection from said universal rod for operating said member.

1 2. In a type-writing machine, the combination with a traveling carriage and character-printing keys, of an escapement for said carriage, a universal bar operated by said keys near the end of their effective stroke, a loose dog forming part of said escapement and normally holding the carriage, a member shiftable to vary the throw of said dog when it releases the carriage. levers for said keys, a universal rod aduniversal bar and said escapement, means for making said interponent effective or ineffective by said second rod, and links adapted to connect said second rod to certain of said keys.

'13. In a typewriting machine, the combination with a traveling carriage and character-printing keys, of an escapement mechanism for said carriage operated by said keys, a bar universal to said keys for operating said escapement mechanism, a'rocking bar extending across said keys and comprlsing extending arms, hooks adapted to engage said keys and also said rocking bararms to rock said bar, so that it forms a member universal to certain of said keys, and means operated by said rocking bar for varying the feed of the carriage by said escapement mechanism.

14. In a typewriting machine, the combination with a traveling carriage and character-printing keys, of an escapement mechanism for said carriage operated by said keys, a bar adjacent said keys, rock-arms upon said bar, headed pins upon said rock-' arms, hook members adapted to engage said keys comprising slots adapted to hook over said headed pins, and a torsional device for maintaining said bar in position to hold said hooks engaged with said keys...

15. In a typewriting machine, the combination with a traveling carriage and an "array of character-printing keys having perforations similarly placed, of a plurality of Rmiversal rods above said keys, operating extensions for said universal rods, removable hooks extending from said perforations to'said extensions to enable the keys to selectively operate said rods, an escapement mechanism varied by said rods, and a single universal bar common to all of said keys for operating said escapement mechanism. 16. In a typewriting machine, the combination with a traveling carriage and an array of character-printing keys having perforations similarly placed, of a plurality of universal rods above said keys operating extensions for said universal rods, removable hooks extending from said perforations mechanism varied by said rods, a single universal bar common to all of said keys for operating said escapement mechanism, a single bracket at each side of the machine in which said rods are journaled, headed pins on said extensions engaging keyshaped perforations in said hooks, and de vices adapted to hold said pins in said hookperforations to hold the hooks in place.

- 18. In a typewriting machine, the combi nation with a traveling carriage and an array of character-printing keys having perforations similarly placed, of a plurality of universal rods above said keys, operating extensions for said universal rods, removable hooks extending from said perforations to said extensions to enable the keys to selectively operate said rods, an escapement mechanism varied by said rods, a single universal bar common to all of said keys for operating said escapement mechanism, a loose dog normally holding said carriage and forming part of said escapement mechanism, a spring adapted to give said loose dog'a throw when it releases said carriage, a stop adapted to be shiftable by one of Said rods to vary the throw of said dog, andan interponent between said universal bar and said dog adapted to make the universal bar ineffective on the dog.

19. In a typewriting machine, the combi nation with character-printing keys and type-bars operated thereby, of a universal bar operated by said type-bars as they approach the platen, a universal rod adjacent said universal bar, operating extensions for said universal rod, removable hooks extending from perforations in certain of said keys to said rod to enable the keys to selectively operate said rod, an esca ement mechanism including a. normally e ective loose dog, a spring adapted to draw on said loose dog when it is made ineffective, a rockarm on said rod, and a stop movable by said rock-arm adapted to selectivel control the throw of said loose dog when mefi'ective.

JOHN C. DOANE. 

